Fifteen-year-old Susan, obsessed with the idea of other worlds, wakes up one night to get a drink and hears a mysterious knock on the door. When she steps outside, she finds herself in a completely different world, her home vanished. As she processes the shock, a strange girl recognizes her and warns her of the danger of being seen. Susan, filled with questions, follows the girl in silence. When Susan finally asks for her name, the girl is taken aback, revealing that they supposedly live together. Confessing her origins, Susan tells the girl everything, setting the stage for a thrilling adventure in a world where nothing is as it seems.
In the epic conclusion to the Devil's Deal series, Freya has one final chance to discover the full potential of her own power, and to use it to restore balance in the universe - once and for all. After the destruction caused by Roisin, Ferya and Torix come to terms with their losses and mistakes... And prepare for a final battle that will change everything.